Will Bulsiewicz

New York Times bestselling author and board-certified gastroenterologist Will Bulsiewicz is a leading authority on the gut microbiome, dietary fiber, and plant-based nutrition. After completing his internship and residency at McGaw Medical Center of Northwestern University from 2006 to 2009, Bulsiewicz served as chief medical resident in internal medicine from 2009 to 2010. He then completed a Gastroenterology Fellowship at UNC Medical Center from 2010 to 2014, where he also held the distinguished role of chief gastroenterology fellow. During this period, Bulsiewicz secured a competitive grant from the National Institutes of Health for a one-year epidemiology fellowship at the UNC Gillings School of Global Public Health.

He followed this success with ‘The Fiber Fueled Cookbook,’ released in 2022, providing practical applications for his dietary philosophy. Currently, Bulsiewicz serves as the U.S. Medical Director for Zoe, a health science company focused on personalized nutrition, where he continues to drive innovation in dietary health. In this role, he champions a plant-predominant, fiber-rich diet, emphasizing its critical role in optimizing gut health and overall wellbeing.

Beyond his corporate leadership, he empowers individuals through various gut health courses, offering accessible tools and education for improving health through diet, lifestyle, and evidence-based supplements. Bulsiewicz continues to expand his influence with his highly anticipated upcoming book, ‘Plant Powered Plus: Activate the Power of Your Gut to Tame Inflammation and Reclaim Your Health,’ scheduled for release in January 2026. Through his ongoing work as an author, speaker, and medical director, he remains dedicated to advancing the understanding of the gut microbiome and its profound impact on human health.